diff --git a/sys/libkern/bcd.c b/sys/libkern/bcd.c
new file mode 100644
index 000000000000..13178f0206fb
--- /dev/null
+++ b/sys/libkern/bcd.c
@@ -0,0 +1,34 @@
+/* 
+ * Some data-tables that are often used.
+ * Cannot be copyrighted.
+ */
+
+#include <sys/types.h>
+
+u_char const _bin2bcd[] = {
+  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,0,0,0,0,0,0,
+ 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,0,0,0,0,0,0,
+ 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,0,0,0,0,0,0,
+ 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,0,0,0,0,0,0,
+ 40, 41, 42, 43, 44, 45, 46, 47, 48, 49,0,0,0,0,0,0,
+ 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,0,0,0,0,0,0,
+ 60, 61, 62, 63, 64, 65, 66, 67, 68, 69,0,0,0,0,0,0,
+ 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,0,0,0,0,0,0,
+ 80, 81, 82, 83, 84, 85, 86, 87, 88, 89,0,0,0,0,0,0,
+ 90, 91, 92, 93, 94, 95, 96, 97, 98, 99
+};
+
+u_char const _bcd2bin[] = {
+0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
+0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,
+0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,
+0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,
+0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,
+0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,
+0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,
+0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,
+0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,
+0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99
+};
+
+char const _hex2ascii[] = "0123456789abcdef";